Paper or leatheroid



(No Model.)

l E. ANDREWS.

MANUPAGTURE 0F PARGHMENT PAPER 0R LBATHEROID.

No. 312,945. Patented Fe'b241885.

11! i illli F EMAIL H )l l Il lUNrrnn Srrlrns Partnr rricr..

EMEBY ANDR EWS, OF KENNEBUNK, MAINE, ASSIGNOR TO THE LEATI-IEROIDMANUFACTURING COMPANY, OF SAME PLAGE.

MANUFACTURE OF PARCHIVIENT-PAPER OR LEATHEROIID.

SPECEFICATIGN forming part of Letters Patent No. 312,915, dated February2-, 1885.

Application filed September 24, 1884.

To @ZZ whom, t may concern: r

Be it known that' I, EMERY ANDREws, of Kennebunk, in the county of Yorkand State of Maine, have invented certain new and use- 5 fnlImprovements in the Manufacture of Parchment-Paper or Leatheroid, ofwhich the following, taken in connection with the accompan yingdrawings, is a specification.

My invention relates to the process of and apparatus to be used inthemanufacture of the parchmentized paper material described in LettersPatent N o. 198,382, granted to T. and T. S. Hanna on the 18th day ofDecember, A. D. 1877; and it consists, first, in treating paper withacid, forming a laminated board by winding said paper around a cylinderor drum of suitable diameter until the material is of the desiredthickness, cutting longitudinally through one side of the paper tube 2othus formed and flattening out the material to form a sheet, and thensubjecting said flat sheet to a bath of refrigerated liquid, preferablyat a temperature below 32, for the purpose of removing the acid.

1t further consists in certain novel combinations and arrangements ofparts in an apparatus for use in removing the acid from the material,which will be best understood by refer ence to the description of thedrawings,'aud to the claims, to be hereinafter given.

Figure 1 of the drawings is an elevation of my improved apparatus. Fig.2 is a vertical section on line x x on Fig. 1; and Figs. 3 and 4t arerespectively a plan and transverse section of one of the racks or framesfor supporting the sheets of material.

A is a tank or reservoir, to be filled with a refrigerated liquid,preferably saltwater with ice immersed therein; and B is another tank,through which said refrigerated liquid is circulated by means of thepump C and pipes D, E, and G. Y

FFF, Fig. 2, are a series of racks or frames, each made up of twolongitudinal bars, a a, and a series of lighter bars or slats, b b, asshown in Figs. 3 and 4.

In carrying out my invention the sheets of board are formed fromacid-treated paper, substantially in the manner described in thebefore-cited Letters Patent. Asheet of freshmade material is placed flatin the bottom of (No model.)`

the tank B, and one of the frames F is placed in said tank in such amanner that the bars'a a shall rest upon the bottom Iof the tank,uponopposite sides of the sheet of material c, and the bars b b shall beabove said sheet, but not touching it. Another sheet c is then placedupon .the bars b b, and another frame F is placed upon the first one,and so on until the tank B is full or nearly so. The tankAhaig- 6o ingbeen previously charged with salt-water and ice, the pump G is set inoperation and sucks the refrigerated liquid contained in the tank Athrough the pipe G and inlet-valve H, and discharges it through thevalve I and pipe E into the tank B. Vhen the tank B is f'ull,or nearlyso, the liquid will escape therefrom as fastasitis pumped inandfallthrough the overflow-pipe D into the tank A again, thusmaintaining a complete circulation ofthe 7o refrigerated liquid over andamong the several sheets of material contained in the tank B,and at thesame time, by virtue of said circulation, maintaining the temperature ofthe liquid in both tanks at the desired point, preferably below 329.When the sheets have been subject ed to the action of the circulatingrefrigerated liquid a sufficient length of time to wash out all theacid, the sheets are removed and dried, when they are ready for use. Itis obvious that the tank A must be considerably larger than the tank B,or else both tanks should be filled with salt-water before setting thepump in operation 5 or the tanks may be of about equal size, and whenthetank B has 8 5 been filled by pumping from tankA a further supply ofsalt-water must be introduced into the tank A, from which to draw inkeeping up the circulation. A It has been found that iu washing out the9o acid in a bath of' water of ordinary tempera` ture a gas forms, whichcauses blisters upon the matcrial,wl1ich is very objectionable. Thisdifficulty is entirely overcome by the use of a refrigerated liquid, asherein described.

lVhat I claim as new, and desire to secure by Letters Patent of theUnited States, is

1. The process of manufacturing parchmentized paper board by firsttreating the paper with acid, forminga laminated board by windroo ingsaid acid-treated paper around a cylinder or drum until the material isof the desired thickness, cutting longitudinally through one side of thepapel' tube thus formed and Hattening out the material to form a sheet,and

then subjecting said flat sheet to a bath of refrigerated liquid,substantially as described.

2. That improvement in the art of making leatheroid or parchmentizedpaper board rac-ks or frames F F, the Vpump C, and pipes D, E, and G,all arranged and adapted to operate substantially as described.

4. In an apparatus forwashing out sheet material, the combination of thetank B and a series of racks or frames, F F, arranged and adapted tooperate substantially as and for the purpose described.-

4 In testimony whereof I have signed my name to this specification, inthe presence of two subscrbingwitnesses, on this 19th day of September,A. D. 188i.

EMEEY ANDREWS.

Vitnesses:

STEPHEN MOORE, HOMEE ROGERS.

